Milling cutter and milling insert with coolant delivery

Abstract

A cutting insert for use in chipforming and material removal from a workpiece wherein coolant is supplied to the cutting insert from a coolant source. The cutting insert includes at least one discrete cutting location and at least one distinct internal channel that corresponds to the cutting location. The internal channel has an inlet to receive coolant and an outlet to exit coolant. The outlet is proximate to the cutting location, and the inlet is radial inward of the outlet.

1. A cutting insert for use in chipforming and material removal from a workpiece wherein coolant is supplied to the cutting insert from a coolant source, the cutting insert comprising:
 a cutting insert body presenting a plurality of discrete cutting locations; 
 the cutting insert body containing a plurality of discrete depressions corresponding to one of the cutting locations and extending toward its corresponding one of the cutting locations; 
 a plate having a central body with a top face and a bottom face, and a plurality of tapered flanges; and 
 the plate being affixed to the cutting insert body wherein each one of the tapered flanges being received within a corresponding one of the discrete depressions so that each one of the discrete depressions and its corresponding one of the tapered flanges and a portion of the central body define one of a plurality of discrete internal channels wherein each one of the discrete internal channels corresponds to one of the cutting locations, and each one of the internal channels has an outlet to exit coolant being proximate to the corresponding cutting location and an inlet to receive coolant being radial inward of the outlet. 
 
     
     
       2. The cutting insert according to  claim 1  wherein the cutting insert body containing a central coolant passage, and the discrete depressions intersecting the central coolant passage, and the central coolant passage receiving the plate so as to define the inlets for each one of the internal channels. 
     
     
       3. The cutting insert according to  claim 1  wherein each one of the discrete depressions has a radial inner portion and a radial outer portion, and the radial inner portion intersecting the central coolant passageway and the radial outer portion being adjacent to the corresponding one of the cutting locations. 
     
     
       4. The cutting insert according to  claim 1  wherein each one of the internal channels having a volume, and the volume of each one of the internal channels decreasing in a radial outward direction. 
     
     
       5. The cutting insert according to  claim 1  wherein one or both of the cutting insert body and the plate is made from one of the materials selected from the group consisting of tool steels, cemented carbides, cermets, and ceramics by a powder metallurgical technique. 
     
     
       6. The cutting insert according to  claim 1  wherein the central body of the plate being of a generally frusto-conical shape. 
     
     
       7. The cutting insert according to  claim 1  wherein the tapered flanges being adjacent to the top face of the plate and extending in a generally radial outward direction. 
     
     
       8. The cutting insert according to  claim 1  wherein the cutting insert body contains a first aperture and the plate contains a second aperture; and when the plate is affixed to the cutting insert body, the first aperture and the second aperture being in alignment so as to permit a fastener to pass therethrough so as to affix the cutting insert to a cutter body. 
     
     
       9. The cutting insert according to  claim 1  wherein the cutting insert body including a surface that is contacted by a clamp so as to affix the cutting insert to a cutter body. 
     
     
       10. A cutting insert for use in chipforming and material removal from a workpiece wherein coolant is supplied to the cutting insert from a coolant source, the cutting insert comprising:
 a cutting insert body having a peripheral rake surface and a bottom surface, and the cutting insert body further having at least one discrete cutting location; 
 the cutting insert body containing at least one discrete depression that corresponds to the cutting location and extends toward the corresponding cutting location; 
 a plate having a central body with a top face and a bottom face, and at least one tapered flange; and 
 the plate being affixed to the cutting insert body wherein the tapered flange being received within the discrete depression so that the top face of the plate is below the peripheral rake surface of the cutting insert body and the bottom face of the plate is even with the bottom surface of the cutting insert body, and the discrete depression and the corresponding tapered flange and a portion of the central body define at least one discrete internal channel that corresponds to the cutting location, and the internal channel has an outlet to exit coolant being proximate to the corresponding cutting location and an inlet to receive coolant being radial inward of the outlet.